drm/amdgpu: Add smc method to register block

Define register access block which consolidates different register access
methods. Add smc method to register access block.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 15 insertions, 3 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reg_access.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_reg_access.h
index e03865c0c093..225d89eabed5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reg_access.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reg_access.h
@@ -25,15 +25,27 @@
 #define __AMDGPU_REG_ACCESS_H__
 
 #include <linux/types.h>
+#include <linux/spinlock.h>
 
 struct amdgpu_device;
 
-/*
- * Registers read & write functions.
- */
 typedef uint32_t (*amdgpu_rreg_t)(struct amdgpu_device *, uint32_t);
 typedef void (*amdgpu_wreg_t)(struct amdgpu_device *, uint32_t, uint32_t);
 
+struct amdgpu_reg_ind {
+	spinlock_t lock;
+	amdgpu_rreg_t rreg;
+	amdgpu_wreg_t wreg;
+};
+
+struct amdgpu_reg_access {
+	struct amdgpu_reg_ind smc;
+};
+
+void amdgpu_reg_access_init(struct amdgpu_device *adev);
+uint32_t amdgpu_reg_smc_rd32(struct amdgpu_device *adev, uint32_t reg);
+void amdgpu_reg_smc_wr32(struct amdgpu_device *adev, uint32_t reg, uint32_t v);
+
 typedef uint32_t (*amdgpu_rreg_ext_t)(struct amdgpu_device *, uint64_t);
 typedef void (*amdgpu_wreg_ext_t)(struct amdgpu_device *, uint64_t, uint32_t);